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Tuesday, October 29, 2013

U.N. ASTEROID DEFENSE SYSTEM. NEAR-EARTH ASTEROIDS.

THE UNITED NATIONS IS BEGINNING STEPS TO MOUNT AN ASTEROID DEFLECTION SYSTEM. FOR MANY YEARS WE HAVE BEEN WELL AWARE OF THE POSSIBILITY OF A CATACLYSMIC ASTEROID STRIKE ON EARTH. THE ASTEROID THAT DAMAGED RUSSIA WAS SMALL IN COMPARISON TO SOME OF THE MORE THAN 10,000 KNOWN NEAR-EARTH OBJECTS (NEOs) THAT HAVE CLOSE APPROACH, AND ARE OVER .6 OF A MILE WIDE. One of the most dangerous asteroids on record zipped close by Earth last month. 2013 TV135 was discovered on October 8, while NASA was closed during the government shutdown.IT GOT THAT CLOSE BEFORE ANYONE DISCOVERED IT!

WE HAD A MUCH CLOSER BRUSH WITH AN ASTEROID THIS YEAR, ANOTHER ONE NOT DISCOVERED UNTIL IT WOULD HAVE BEEN TOO LATE FOR DEFLECTION.

On February 15 this
year, asteroid 2012 DA14, which measured 150 feet wide, slipped in below
the moon's orbit and squeaked by our planet just 17,200 miles from its
surface. [THERE ARE VERY GOOD VIDEOS OF THIS ON THAT 2nd LINKED SITE.]

Scientists spotted it only ONE YEAR AGO from an observatory in the south of Spain. An asteroid this size passes this close to Earth only every 40 years and collides with it only once every 1,200 years.U.N. AGREES TO TAKE MEASURES TO PROTECT EARTHThe U.N. General Assembly last week gave the green light to an asteroid
defense plan drawn up by the former astronauts at the Association of
Space Explorers (ASE) ,Scientific Americanreports. The plan calls for member nations to join forces in an
"International Asteroid Warning Group" committed to sounding the alarm
if a dangerous rock is spotted. A spacecraft would then be launched to
knock the asteroid off course.The ASE also wants the U.N. to run a practice deflection mission, to make sure the method actually works.

Right now, no nation has an explicit responsibility to defend against
an asteroid, and one former astronaut explained why the task should
fall to the U.N., reports Space.com:
"If something goes wrong in the middle of the deflection, you have now
caused havoc in some other nation that was not at risk. Therefore,
this decision of what to do, how to do it, and what systems to use have
to be coordinated internationally."

ANY INCOMING ASTEROID WOULD HAVE TO BE DEFLECTED 5 YEARS BEFORE IMPACT.Further, early detection is
essential, because the deflecting spacecraft will likely have to hit the
rock five years before its rendezvous with Earth in order to be
successful.

"If we don't find it until a year out, make yourself a nice
cocktail and go out and watch," one former astronaut says.

What Is A Potentially Hazardous Asteroid (PHA)?Potentially Hazardous Asteroids (PHAs) are currently defined
based on parameters that measure the asteroid's potential to make
threatening close approaches to the Earth.
Specifically, all asteroids with a minimum orbit intersection distance
(MOID) of
0.05 AU or less
and an absolute magnitude (H) of 22.0 or less
are considered PHAs. Particles from space bombard our planet every minute -- at a rate of 100 tons a day, NASA says.

TWO ASTEROIDS HAVE RECENTLY BEEN SPOTLIGHTED AS HAVING THE BEST CHANCES OF IMPACTING EARTH. 2013 TV135If it struck the earth, the impact from 2013 TV135 would cause damage to
an area of approximately 100,000 square miles with an equivalent force to about 2,500 megatons of TNT, or 2,500 standard nuclear warhead-bearing US Minute Man II missiles.AND2011 AG5It had a 1 in 500 chance of impacting the Earth on 5 February 2040.In September 2013, there was an opportunity to make additional
observations of 2011 AG5 when it came within 0.98 AU (147,000,000 km;
91,000,000 mi) of Earth.
The 2013 observations allowed a further refinement to the known
trajectory. The asteroid will also pass 0.0121 AU (1,810,000 km;
1,120,000 miles) from the Earth on 3 February 2023 [7][10

THE LARGEST ASTEROIDS WE KNOW OF THERE ARE MANY WITH INCREDIBLE MASS, BUT WE CONCENTRATE ON NEAR-EARTH LARGE ASTEROIDS.

1~ 1036 GANYMEDAt about 21 MILES ACROSS (32–34 km in diameter), it was discovered by Walter Baade on October 23, 1924. It has a very well determined orbit, and its next pass of the Earth will be at a distance of 0.374097 AU (55,964,100 km; 34,774,500 mi) on 13 October 2024. It is an Amor asteroid, and also a Mars-crosser asteroid, and will pass 0.02868 AU (4,290,000 km; 2,666,000 mi) from Mars on 16 December 2176.[7]

2~ 433 EROS 433 Eros is an S-type near-Earth asteroid approximately 34.4 × 11.2 × 11.2 kilometres (21.4 × 7.0 × 7.0 MILES) in size, the second-largest near-Earth asteroid after 1036 Ganymed.
It was discovered in 1898 and was the first near-Earth asteroid
discovered. It was the first asteroid to be orbited by a probe (in
2000). It belongs to the Amor group.
Eros is a Mars-crosser asteroid, the first known to come within the orbit of Mars. 3~ 4179 ToutatisOn December 12, 2012 at 06:40 UT Toutatis passed within about 18 lunar distances of Earth.Toutatis will approach Earth in 2016, but will not make a notably close approach until 2069. HOWEVER, TOUTATIS HAS A VERY CHAOTIC ORBIT.Radar
imagery shows that Toutatis is a highly irregular body consisting of
two distinct "lobes", with maximum widths of about 4.6 km and 2.4 km
respectively, about 3 x 1.5 miles.

TO SEE OTHER, ACTUALLY MANY, NEAR-EARTH ORBITERS, JUST CLICK HERE. ALSO SHARING OUR SOLAR SYSTEM, CLOSE-BY IN THE ASTEROID BELT ARE SOME VERY LARGE, ALMOST PLANET-SIZED OBJECTS THAT WE CALL ASTEROIDS AS WELL. ~ 1 Ceres, is the largest asteroid and the only dwarf planet in the inner Solar System. It is a rock–ice body 950 km (590 miles) in diameter and the smallest
identified dwarf planet. It contains about one-third of all the mass of the asteroid beltIt appears to be differentiated into a rocky core and icy mantle,[8] and may harbor an ocean of liquid water under its surface.

~ 4 VESTAVesta is the brightest asteroid visible from Earth. Vesta is the second-most-massive body in the asteroid belt, though only 28% as massive as Ceres.Measures 342 x 287 MILES (550 km × 462 km).NASA's Dawn spacecraft
entered orbit around Vesta on 16 July 2011 for a one-year exploration,
and what is known about Vesta will be refined and extended as data from Dawn is analyzed and published. Dawn left Vestan orbit on 5 September 2012 heading for asteroid Ceres.

Scientists say it is
likely that the impact of an asteroid over six miles wide wiped out
dinosaurs along with much of the life on Earth 65 million years ago.

More like it will come, NASA says.

But they only turn up once every "few million years."

That may give humanity some time to find a way of dealing with it. If
the nations of earth CAN come together to build an asteroid deflection
program, we will still need more intense and far better discovery
capability and methods of tracking asteroids within that 5-year deadline
for our awareness of their near presence to do us any good.

We MUST find them before they cross that "5-year limit" and be able to launch a deflection immediately. BUT, BEFORE ALL THAT, WE MUST DETERMINE IF THIS IS EVEN POSSIBLE.

Learn what would happen if an asteroid hit the Earth with this detailed "Large Asteroid Impact Simulation".An
asteroid with a diameter of 500 km. Destination: The Pacific Ocean. The
impact peels the 10 km crust off the surface. The shock-wave travels at
hypersonic speeds. Debris is blasted across into low Earth orbit, and
returns to destroy the surface of the Earth. The firestorm encircles the
Earth, vaporizing all life in its way. Within one day, the surface of
the Earth is uninhabitable.The evidence shows that this has happened at
least six times in Earth's history.

The video below shows the possibility, all merely theory, of course, of a smaller impact, calling the event a meteorite impact, not an asteroid.

3 comments:

...a possible solution... INCREASING ITS SPEED, gives it a shove, TOWARDS A SIDE IF THERE ARE LITTLE TIME, to what speed gives it thrust towards a side for deflecting it?...speed = space/time...so if want that it passing "close shaving" to 1,000 kms from Earth = 1 million mts, and having approx. 11 days = 1 million seconds, the correction speed will be of: 6,000 kms approx. Earth radius + 1,000 kms = 7,000 kms; 7 million mts/1 million seconds = 7 mts/second (25 kms/hour). If it increases forwards speed, it climbs to a higher orbit, and vice versa: circular orbit radius = (mass*speed²)/force (centripetal) from Sun gravitational attraction.

...or...decreasing its mass. Is that perhaps the asteroid orbit will continue equal whether its mass increases at double or decreases at half?. No. (By the Angular Momentum, mass*speed*radius, Conservation Law, when mass changes and linear speed continues equal without motor thrust: if mass decreases...radius increases, angular speed decreases, period increases, and vice versa, till it reaches the new stable orbit). If mass increases, bad...it brings near in its radius minimum (perihelion) it "falls" towards the Sun, because with its new major mass also there is a new major Sun gravitational attraction and now it would need major centrifugal force, major speed, for remaining in the same stable orbit (equal angular speed and different linear speed = different centrifugal force, as in Earth poles or equator...equal linear speed and different angular speed = also different centrifugal force, as in "whip" fairground attraction)...and it brings far in its radius maximum (aphelion), it doing a more elliptic new orbit, radius medium decreases... And vice versa: if MASS DECREASES, good...it brings far in its perihelion from Sun, and from Earth, because still conserves speed that it had with the major mass before and at same time decreases the Sun gravitational attraction, it doing a more circular new orbit, radius medium increases. Formulas: for circular orbit...radius = (mass*speed²)/force (centripetal) from Sun gravitational attraction... For elliptic orbit, besides...the Newton´s Universal Gravitation Law: F = G((m1*m2)/distance²)...the Kepler´s 3th Law...line Sun------→asteroid sweeps equal areas in equal times: Period²/radius medium³ = Constant... Taking into account besides its changes of speed: it brings near accelerates, it brings far decelerates...etc.